Lawyers say three former Salvadoran military officers who Spanish courts wanted to put on trial for their alleged roles in the killing of six Jesuit priests have been freed from prison after the Supreme Court denied their extradition.

The court had decided to deny their extradition earlier this month, but they were not freed until late Friday night.

Lawyer Carlos Guzman Segovia criticized the court for the delay and warned of further legal action.

Former sergeants Tomas Zarpate Castillo and Antonio Ramiro Avalos Vargas, as well as Cpl. Angel Perez Vasquez were released. Col. Guillermo Alfredo Benavides remained in custody.

They were accused of involvement in the 1989 killing of six priests, five of whom were Spanish, and two of their employees.

The killings occurred during El Salvador's civil war.